Finding folder locations for custom textures of others' maps

EmNudge

L4: Comfortable Member
Sep 23, 2015
184
60
Well I want to make a SFM animation, but it requires HDR lightmaps. To do this, I must edit a map in hammer and compile it with that checkbox ticked.
Problem: it is completely made with custom textures. It's a minecraft map, don't ask why, but it is.
When trying to save the custom textures with pakrat, I can never find the right folder. I always get "missing texture" errors when compiling (and everything is white in hammer).
Usually mappers also create custom folders, this never creates the folders.

So...how would I download it to automatically fit the format the mapper put it in, so that I can compile it in hammer with no texture problems?